Do you mean the error occur on publishing or on viewing in twviewer.jar?
If viewing, Please copy the java console information and paste here(or easypano support-email). It will be helpful to solve the problem.
If you use sun jvm, you can get information to click the menu "tools->sun java console".
If you use ms jvm, first select the java console option by click the menu "tools->internet option->advanced->Microsoft VM->java console", second you can get the information to click the menu "view->java console".
I think this is helpful for easypano to catch the error.
------------- Easypano Observer
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